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	Podcast:		TED Radio Hour
	Episode:		Doppelgangers
	Category:		Technology
	Duration:		00:50:35
	Publish Date:		2024-02-09 08:00:45
	Description:		The term can refer to a double, a ghost, a shadow. But it can mean much more. From our online mirror world, to digital simulators, to the Earth's twin--TED speakers learn from the uncanny second self. Guests include author Naomi Klein, aerospace engineer Karen Willcox, planetary scientist Sarah T. Stewart and psychologist Nancy Segal. TED Radio Hour+ subscribers now get access to bonus episodes, with more ideas from TED speakers and a behind the scenes look with our producers. A Plus subscription also lets you listen to regular episodes (like this one!) without sponsors. Sign-up at plus.npr.org/ted.
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